C Program to demonstrate extern variable.

C Program to demonstrate extern variable. Extern variables are very useful in c,when the source code is in the two or more files, you can refer the variables from one file to another using extern variables. Extern variables are also global variable,but in explicit manner. Read more about C Programming Language .

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#include<stdio.h>
void write_extern(void);

extern int count;

void write_extern(void)
{
printf("count is %in", count);
}

int count = 5;

main()
{
write_extern();
}

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